The Lee model for area-to-area mode is a radio propagation model that operates around 900 MHz.
Built as two different modes, this model includes an adjustment factor that can be adjusted to make the model more flexible to different regions of propagation.
This model is suitable for using in data collected.
The model predicts the behaviour of all links that has ends in specific areas.
Frequency: 900 MHz band The Lee model is formally expressed as:
γ log d
− 10 log
where, The reference path loss is usually computed along a 1 km or 1 mile link.
Any other suitable length of path can be chosen based on the applications.
( log λ
where, The adjustment factor is calculated as:
{\displaystyle F_{A}\;=\;F_{BH}\;F_{BG}\;F_{MH}\;F_{MG}\;F_{F}}
{\displaystyle F_{BH}\;=\;\left(\;{\frac {h_{B}}{30.48}}\;\right)^{2}}
{\displaystyle F_{BH}\;=\;\left(\;{\frac {h_{B}}{100}}\;\right)^{2}}
{\displaystyle F_{MH}\;=\;{\begin{cases}\;\;{\frac {h_{M}}{3}}\;\;\;\;{\mbox{ if, }}h_{M}>3\\{\Big (}{\frac {h_{M}}{3}}{\Big )}^{2}{\mbox{ if, }}h_{M}\leq 3\end{cases}}}